directory based history bash profile

mycd.sh

function cd_dir_history()
{
    OLDPWD="$PWD"
    echo "# $(date) $USER -> $@" >> "$HISTFILE"

    command cd "$@"

    # If this directory is writable then write to directory-based history file
    # otherwise write history in the usual home-based history file.
    touch "$PWD/.dir_bash_history" 2>/dev/null \
        && export HISTFILE="$PWD/.dir_bash_history" \
        || export HISTFILE="$HOME/.bash_history";

    echo "# $(date) $USER <- $OLDPWD" >> "$HISTFILE"
}

# Replace the regular `cd` command.
alias cd="cd_dir_history"

#initial shell opened                                                                                     
export HISTFILE="$PWD/.dir_bash_history"

#timestamp all history entries                                                                            
export HISTTIMEFORMAT="| %Y-%m-%d %H:%M:%S | "
export HISTCONTROL=ignoredups:erasedups
export HISTSIZE=1000000
export HISTFILESIZE=1000000
export HISTIGNORE="exit:sutom:top:sync:l:ll:pwd:history"

shopt -s histappend ## append, no clearouts                                                               
shopt -s histverify ## edit a recalled history line before executing                                      
shopt -s histreedit ## reedit a history substitution line if it failed                                    

## Save the history after each command finishes                                                           
## (and keep any existing PROMPT_COMMAND settings)                                                        
export PROMPT_COMMAND="history -a; history -c; history -r; $PROMPT_COMMAND"